Hashes noble-hashes xof

cSHAKE256 Generator - High-Security Customizable XOF

Generate cSHAKE256 customizable XOF with 256-bit security and NIST SP 800-185 domain separation.

cshake256.workspace
3 options
0 bytes UTF-8, Hex, Base64, or File input
Options

Secure client-side computation. No data leaves your browser. Privacy Security

Result Output

What Is cSHAKE256?

cSHAKE256 is a customizable extendable-output function defined in NIST SP 800-185, providing 256-bit security with optional function-name and personalization parameters for domain-separated XOF applications.

Specifications

Output Size Variable
Standard NIST SP 800-185
Standard Year 2016
Origin Keccak submission to NIST SHA-3 competition
Origin Year 2008

Use Cases

  • High-security protocol XOF requirements
  • Domain-separated key derivation
  • NIST-compliant high-security randomness
  • Advanced cryptographic protocol design
  • Post-quantum cryptography preparations
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Security Notice

cSHAKE256 is a secure extendable-output function when used with an appropriate output length. Use a dedicated KDF or password hashing algorithm for password storage.

Related Tools

cSHAKE128 Hashes SHAKE256 Hashes KMAC256 MACs

Utilities

File Hash Verifier Verify local files against published checksums. Hash Compare Compare expected and actual digest values. Multi Hash Generator Generate common hashes from one input.

Guides

Algorithm Comparison Guide Choose the right primitive for each task. Hash Test Vectors Compare known outputs across common algorithms.

Implementation Notes

Practical usage details for this browser-based cSHAKE256 tool.

How to Generate a cSHAKE256 hash

  1. Choose UTF-8, Hex, Base64, or File input mode.
  2. Enter text, encoded bytes, or choose a local file to process.
  3. Adjust the cSHAKE256 options if your use case requires non-default settings.
  4. Click Generate cSHAKE256 Hash and copy the result.

Example Input

Sample input:

abc

Use this sample input, then copy the generated hash from the result panel.

When Not to Use cSHAKE256

  • Do not use a plain hash or derivation output directly as password storage without the right password-hashing construction and parameters.

Recommended Alternatives

Review related tools when you need a different output size, security margin, or keyed construction.

Frequently Asked Questions